<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>求圆的面积与周长</title>

</head>
<body>
<div style=" margin: auto; text-align: center; margin-top: 250px; padding-top: 50px;
 background-color: aquamarine; width: 400px; height: 120px; border-radius: 20px;
 " >
    <span>半径:</span><input type="text" placeholder="请输入半径" id="r"><br>
    <span>周长:</span><input type="text" placeholder="周长" id="r2"><br>
    <span>面积:</span><input type="text" placeholder="面积" id="s"><br>
</div>
<script src="js/script.js"></script>
</body>
</html>